In a field in Loghill, in the old barony of Connello Lower in County Limerick, a circular enclosure roughly 35 metres across sits quietly in grassland, its outline unreadable at ground level. Only from the air does it become legible, the faint trace of a fosse, a defensive or boundary ditch, describing a near-perfect circle in the earth beneath the turf.

The enclosure was identified through aerial photography rather than any excavation or surface survey. Its outline appears in Digital Globe orthophotos taken between 2011 and 2013, as well as in earlier Ordnance Survey Ireland aerial imagery, meaning it had been sitting in the photographic record for some time before being formally recorded. The site was compiled by archaeologist Caimin O'Brien and uploaded to the national record in June 2020. Circular enclosures of this general type are common across the Irish landscape and often represent the remains of a rath or ringfort, a type of enclosed farmstead typically dating from the early medieval period, roughly the fifth to the twelfth centuries. A fosse, where one survives, would originally have formed part of a boundary system, sometimes paired with an earthen bank on its inner edge. Without excavation, the precise date and function of the Loghill example remain unknown.

Because the enclosure survives as a cropmark or soilmark rather than as upstanding earthworks, a visit in the conventional sense offers little to the naked eye. The feature is most legible under specific conditions, particularly in dry summers when differential moisture in the soil causes grass or crops above buried features to grow or colour differently from the surrounding field. Anyone with a serious interest would do better to examine the orthophotographic sources through the Historic Environment Viewer, where the circular outline can be traced clearly. The site sits within private farmland, so access would require the landowner's permission. What makes it worth knowing about is less what you can see on the ground than what it suggests: that the fields of Connello Lower contain layers of activity that have not yet been dug into, and may never be.